Loud speaker for radio receiving apparatus



Sept. 18, 1928.

A. H. HAAG LOUD SPEAKER FOR RADIO RECEIVING APPARATUS Filed Jan. 26, 1925 2 Sheets-Sheet 1 Sept. 18, 1928. 1,684,956

A. H. HAAG LOUD SPEAKER FOR RADIO RECEIVING APPARATUS Filed Jan. 26, 1925 2 Sheets-Sheet 2 mum/5&8

. w', #VENT-OFM (IBY M,

ATTORNE S.

Patented sept. 1a,- 192s.

ALFRED mnAAG, 'or BALTIMORE, MARYLAND, AssIGNoB. or EIETEEN ONE-lalun-v PATENT oFFlcE.

naEnrHs To HAYWIAED EAIRBANKS, or mEacnANrvILLE, NEW JERSEY. Loan srEAxEa non mimo nEcErvnm Ai=rA.a.Amus.

Application med January In loud speakers for radio receiving apparatus of the character commonly 1n vogue, it is customary for the horn or amplifying element either to stand exposed upon a b ase,

5 within which is the unit, or` the amplifier is contained in a rectangular box like casing, which is generally superimposed upon the radio cabinet giving the ap arance of rectangular boxes piled on eac other. In the first mentioned construction where the amplifier is exposed and its lowerportion of gradually reduced area tapermg downwardly towards the base `there 1s a sl1ght impairment o f the reproductions owlng to the vibrations of the amplifier body when 1n use which in ractice should have both its 'endsretained 1n a substantially fixed position to" attain the best results.

In addition the mouth or exit end of this class of amplifiers being relatively large and heavy as compared with the lower amplifier portion connected to the base or unit, there isa substantial weight at the upper portion of the device, which tends to vibrate more' or less according to the character of the reproduced sounds, and such vibration is but artially resisted or counteracted by the ower goose neck reduced portion of the device as the lowermost portion ofthe device is of the least area in cross section.

In the second square box class of devices, y

the entire inner capacity or area of the box or casing has not heretofore been utilized to themaximum extent to which I utilize it, by giving the amplifier the length and contour which I have devised, and there is conse uently lacking the maximum amount o amplification, which I attain in my present novel construction.

In order to avoid the objectionable features and defects of these prior devices, I have devised the present construction, which results in an outer casing of a pleasing and graceful contour, and wherein a maximuml amplification is obtained. In addition as it is desirable to have a time piece in proximity to the radio apparatus, so that the operator can readily ascertain from his radio log the exact time of the operation of the various broadcasting stations, so that the desired station can be instantly tuned in,

I provide the am lifier exit with a foruminous covering, o silk, fine wire mesh or other suitable material having a clock face -56 portrayed, `stamped or, otherwise impressed 26, 1985. Serial No. 4,708.

the amplifier and its adjuncts, being utilized for a bearing for the clock arbor or mechp anism which actuates the clock hands.

vBy this novel construction, in a single structure, I have roduced a highly eilicient sound ampllfier w ose'casing is further utilized not only to support and conceal the i amplifier audits adjuncts and to hold them properly 1n position, but also to support a suitable clock mechanism, whose clock face j consists of a foraminous dial, which not only affords no obstruction to the exit of the reproduced sound waves, but also serves as an ornamental and eflicient time indicator.

To the above ends my invention consists of a no vel construction of a loud s eaker forl radio receiving apparatus, 'wherein the casing or outer portion thereof is given a contour that results in a graceful, ornamental andl pleasin appearance, simulatin a clock 'case or t e. like, said casing bemg constructed in a novel manner and if desired built up of sections, which can be cheaply made in large quantities in'duplicate, and provision is made for utilizing to a maximum extent the internal capacit or area of the casing, which has heretofore been wasted, for housingand supporting anamplifier of maximum length, which has the loud speaker unit connected to its rear end and supported in the rear casing wallfwhile the front or exit end of the amplifier is mounted in the front wall of the casing and secured thereto and the joint therebetween concealed in a novel manner.

Itv further consists of a novel construction of loud speaker of the character hereinabove referred to, wherein the front exit portion thereof is covered with suitable material, having thereon a clock face or dial, provision being mad'e for housin within the same casing which contains t e amplier, suitable clock actuating mechanism; a wall of saidamplifier serving as a bearing for the clock arbor.

It further consists of a novel construction of loud speaker casing, having its front and rear walls in duplicate, the rear end of the amplifier vcarrying the loud speaker unit being supported in the rear wall and the front end of the amplifier being supported in the front wall of the casing, 1n combination with an outer ring, secured to the casing front which serves to conceal the exit end of the amplifier and to also retain in position the silk or wire mesh or other material which covers the exit opening of the amplifier, and may if desired be utilized as a clock face.

It further consists of other novel features of construction and advantage, all as will be hereinafter fully set forth and pointed out in the claims appended hereto.

For the purpose of illustrating my invention I have shown in the accompanying drawings forms thereof which are at present preferred by me, since they have been found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise arrangement and organization of these instrumentalities as herein shown and described.

Fig. 1 represents a perspective front view of a loud speaker for radio receiving apparatus, embodying my invention.

i' Fig. 2 represents a horizontal section on line 2--2, Fig. 3, showing the contour of the amplifier, certain parts of the amplifier being shown in elevation.

Fig. 3 represents a vertical section on line 3-3, Fig. 1.

Fig. 4 represents on an enlarged scale, a horizontal section on line 4 4, Fig. 1.

Figs. 5 and 6 represent vertical sectional views of modifications showing the casing as made of metal.

Fig. 7 represents a perspective view of my invention applied to a grandfathers clock.

Fig. 8 represents a section on line 8--8, Fig. 7.

Figs. 9 and 10 represent front elevations of clock dials,

Similar numerals of reference indicate corresponding parts.

Referring to the drawings 1 designates my novel construction of loud speaker, tlie same comprisinga front wall 2 and rear wall 3, said walls being made in duplicate and attached to or supported on a suitable base 4. The front and rear walls are provided with a convex upper portion, as indicated at 5, and concave side portions as indicated at 6, said side portions merging into and abutting against the lower convex or moulded transverse terminal portions or bars 7, whereby a very graceful and pleasing contour is given to said walls, the latter simulating a clock case. The front wall 2 has a circular opening 8 therein, in which is contained the exit portion 9, of the amplifier 10, whose construction and contour will be understood from Figs. 2 and 3. The

portion 16 merges into the main body 17 and exit end 9, which is seated and secured within the circular opening 8 by screws or the like.

It will be evident from Figs. 1 and 2, that the amplifier, composed of the portions 14, 15 and 16 and the intervening portions, which are of graduall increasing area in cross sectionfrom the inlet 11 to the exit 9, is of a maximum length, since I provide the return bend or loop construction comprising the portions 14, 15 and 16 whereby a maximum amplification is attained. Over the exit end 9 of the amplifier I place the disk or covering of silk or fine wire mesh, as indicated at 18, and saidmesh is secured in position by the outer ring 19 which is held in position by screws or other fastening devices 20. The space between the front and rear walls 2 and 3 is occupied by the wall 21, which may be of metal or fibre or veneering of any suitable ply, which conforms to the general contour of said front and rear walls 2 and 3, the edges of said veneering being rabbeted into said walls 2 and 3, as indicated at the points 22 and 23.

In my novel construction, I am enabled to utilize the wire mesh or other material, 18 as a clock face or clock dial, by placing thereon, numerals as 24. The rear inclined wall 25 of the amplifier has the horizontal bearing 26 formed therein for the clock arbor 27, which carries the clock hands 28 and 29, said arbor being operated by suitable conventional clock mechanism contained in the casing 30, which is mounted in the rear casing wall 3. The front end of the clock arbor 27 may pass through and be guided in a bearing in the center of the bar 31, which preferably extends horizontally across the exit end 9 of the amplifier in the rear of the ring 19, and has its ends secured against the front of the wall 2 by the screws 20 already described as securing said ring 19 in position. I preferably make the rear wall 3 solid, but if desired I may split the front wall 2, at the upper and lower points, 32 and 33, which facilitates the assembling of the front end 9 of the amplifier in position, said front end terminating about flush with the front wall 2 as seen in Fig. 3. Following the assembly of the amplifier the disk 18 is next placed in position, and when the ring 19 is assembled, and secured in position it conceals the edge of the disk or clock face 18, and also conceals the front end of the lll lil

amplifier, thereby giving a neat and attractive appearance to the ent-ire front of the loud speaker casing.

, In the above described construction, the clock mechanism can of course be omitted, if desired, in which case the disk 18 would be plain with the numerals 24 omitted, and the parts 26, 27, 28, 29, 30 and 31 would also be omitted. 4

It is obvious that a loud speaker, constructed as seen in Fig. 1, either with or without the clock mechanism presents a very attractive appearance as compared with the top-heavy exposed horns, or the rectangular box like structures now in vogue, and in addition marked acoustical advantages are gained, by anchoring the front and rear ends of the am lifier, and by increasing the amplifier area or the maximum amplification of the sound waves, in the manner explained. If desired the loud speaker-casing canfoe made entirely of sheet metal as seen in- Figs. 5 and 6, the casing in Figs. 5 and 6 which it will be understood are horizontal sections conforming generally to Fig. 2. In Fig. 5, 33 designates the casing front and 34 its rearhaving the central seat 35 for the clock casing 30, the outer shell being indicgted at 36 and spot welded at the points 3 In Fig. 6, 38 and 39 represent the front and rear walls and 40 the outer wall, the contiguous edges being joinedby pressed seams as indicated at 41, it being understood that the front appearance of the Casings'seen in Figs. 5 and 6 conforms to Fig. 1.

In Figs. 7\ and 8, I have shown the broad principle of my invention as applied to a grandfathers or hall clock cabinet 42, the radio being indicated at 43, which is accessible by the drop door/44, the radio being supported on the partition 45, which may also support the unit 46, leading to the amplifier 47. The manner of securing the clock dial and its/adjuncts in position isthe same as already described, and will be understood Wit-hout further description.

In the constructionvseen in Figs. 7 and 8 I have designated the clock mechanism and its adjunct's with the same reference letters'as already used and itwill be apparent that a grandfathers clock or hall clock of the construction described, is especially adapted vfor the utilization of my invention, since there isa great deal of Wasted space within the cabinet of the same.

In my invention, the intermediate portion of the cab'net is readily adapted to receive the radio, While the lower portiony of the cabinet is especially adapted to receive the A and B batteries, as indicated at 48 and 49, said batteries being supported upon the partition or shelf 50, and being readily appear as seen in Figure 10, the hands of the Vclock and the clock arbor being omitted from said figure.

By positioning the clock and its adjunrts,

and collocating the clock dial, in proximity to the amplifier exit, the radio operator is enabled to ascertain readily and exactly, While or before he is tuning in, the exact time of the broadcasting of the desired performance, as is evident.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is

1. In a device of the character stated, an

'amplifier for sound reproducing mechanism lhaving, a clock face formed on the front of the vibratory portion thereof and vble clock hands coacting with said "c ook ace.

2. As a'. new article of manufacture, a cover for the exit opening of an amplifier for sound reproducin mechanism comprising a sheet having ac ock dial and movable clock hands coacting with said sheet ositioned in proximity to the outer perip ery thereof.

3. As a new article of manufacture, a disk having a clock face thereon and adapted to serve as a cover for the exit opening of an amplifier for sound reproducing mechanism, movable clock hands coacting with said face and a ring inclosing said cove-r and concealing the peripheral edges of said disk and amplifier. v

4. The combination of a sound amplifier, a casing therefor havin a front opening aligning with the exit end .of said amplifier, a foraminous sheet covering said opening movable clock hands on said sheet, and an outer ring secured to said casing and concealing the edges of said sheet and amplifier.

5. In a loud speaker, an amplifier, a casing therefor having a lfront portion in which the exit end of said amplifier is secured, a sheet of foraminous material having a clock dial thereon positioned on the front of said casing to conceal the exit portion of said amplifier, movable clock hands coacting with saiddial anda ring covering the outer edges of said sheet and amplifier and secured to the front of said casing.

SI i

Il@ i' 6. In a device of the character stated', an

amplifier, a casing therefor, having a front is fixedly secured, a sheet of foraminous material having a clock dial thereon secured to said front Wall to conceal the amplifier e\it7 movable clock hands coacting With said dial and a ring surrounding and concealing the periphery of said sheet and the junztion of said amplifier with said front Wa 7. The combination of an amplifier casing formed of front and rear vertical Walls having a convex top, convex side portions and transverse end pieces convex at their tops, said front Wall having a circular exitv opening therein, a top Wall convex at its top and concaved at its sides and secured in inner juxtaposed grooves in said front and rear Walls, said grooves being convex at their tops and merging into convex side grooves, and an amplifier contained in said casing and having its exit portion secured in said circular opening in said front Wall.

8. In a loud speaker, an amplifier having ALFRED H. HAAG.

CERTIFICATE OF CORRECTION.

Patent No. l, 684, 956.

Granted September I8, to

ALFRED H. HAAG.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 3, lines 100 to ym2, claim 2, strike out the words "positioned in afg u said Lettere Patent should berend with this correction tliereinltlu'tithe"":sauiomay contorni tothe record of fhe'cse in the Patent Office.

Signed and sealed this 20th day of November, A. D. 1928.

(Seal) M. J. Moore,

Acting Commissioner of Patents; l

proximityl to the outeru'peijipli'ery there.; and insertthe same to follow after the word "dial 

